package com.authority.security.handler;
import com.alibaba.fastjson.JSON;
import com.authority.security.exception.CustomerAuthenticationException;
import com.authority.utils.Result;
import com.authority.utils.ResultCode;
import org.springframework.security.authentication.*;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.web.authentication.AuthenticationFailureHandler;
import org.springframework.stereotype.Component;

import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.nio.charset.StandardCharsets;

/**
 * 用户认证失败处理器
 */
@Component
public class LoginFailureHandler implements AuthenticationFailureHandler {
    //定义状态码
    @Override
    public void onAuthenticationFailure(HttpServletRequest request, HttpServletResponse response, AuthenticationException exception) throws IOException, ServletException {
        //设置响应的编码格式
        response.setContentType("application/json;charset=utf-8");
        //获取输出流
        ServletOutputStream outputStream = response.getOutputStream();
        //定义变量，保存异常信息
        String message=null;
        //定义状态码
        int code=500;
        //判断异常类型
        if(exception instanceof AccountExpiredException){
            message="账号过期，登录失败！";
        } else if (exception instanceof BadCredentialsException) {
            message="用户名或密码错误，登录失败!";
        } else if (exception instanceof CredentialsExpiredException) {
            message="密码过期，登录失败！";
        } else if (exception instanceof DisabledException) {
           message="账户被禁用，登录失败！";
        }else if(exception instanceof LockedException){
            message="账户被锁，登录失败！";
        }else if (exception instanceof InternalAuthenticationServiceException){
            message="账号不存在，登录失败！";
        }else if (exception instanceof CustomerAuthenticationException){
            message=exception.getMessage();
            code=600;
        }else{
            message="登录失败！";
        }
        //将结果转换成JSON格式
        String result = JSON.toJSONString(Result.error().code(code).message(message));
        outputStream.write(result.getBytes(StandardCharsets.UTF_8));
        outputStream.flush();
        outputStream.close();
    }
}
